{"product_id":"x-factor-sudoku-9781440122026","title":"X-Factor SuDoku","description":"Catch the latest wave in Sudoku-mania! These 275 X-Factor SuDoku puzzles are for the diagonally challenged, in 6 difficulty levels from Simple to Fiendish.\u003cp\u003e X-Factor puzzles follow the same rules as for regular SuDoku puzzles PLUS the two shaded diagonal regions also contain the numbers 1 to 9 once only.\u003c\/p\u003e\u003cp\u003e Each X-Factor puzzle is joined to a previous and following puzzle through common puzzle solution numbers. As well, this book is an extension of \"The World's Longest SuDoku Puzzle\", now at 1,271 puzzles in length.\u003c\/p\u003e\u003cp\u003e Includes strategy guide for solving SuDoku puzzles, and tips on how to find X-Factor numbers. And for those who still can't get enough, try solving 275 riddles!\u003c\/p\u003e\u003cp\u003e Joe Defries is a current 2-time Guinness World Record holder, and is the joe in suJoku.com \u0026amp; joe-ks.com (the Largest Source of Internet Humour). Betcha Can't Beat That!*\u003c\/p\u003e\u003cp\u003e * re Joe's 'super-human puzzling feat' - the World's Longest SuDoku Marathon - as published in \"The Addict's Guide to Everything Sudoku\" by Fiorella Grossi, Fair Winds Press, 2007\u003cbr\u003e\u003cbr\u003e\u003cb\u003eBinding Type:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e iUniverse\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/05\/2009\u003cbr\u003e\u003cb\u003eISBN:\u003c\/b\u003e 9781440122026\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 328\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.72lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 8.00h x 5.00w x 0.69d\u003c\/p\u003e","brand":"Joe Defries","offers":[{"title":"Default Title","offer_id":42573256360117,"sku":"9781440122026","price":19.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/0804\/6492\/products\/img_9f67b6d1-0a66-4612-9550-e982450adfdf.jpg?v=1672155365","url":"https:\/\/pastforward.org\/products\/x-factor-sudoku-9781440122026","provider":"Past Forward","version":"1.0","type":"link"}